package com.example.boot1;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

/**
 *
 *题目：多线程之间按顺序调用，实现A->B->C三个线程启动，要求如下：
 * AA打印5次，BB打日红次，CC打印15次
 * 紧接着
 * AA打印5次，BB打印10次，CC打印15次
 * 来10轮
 */
class ShareSource{
    private int number = 1; //1:A 2:B 3:C
    private Lock lock = new ReentrantLock();
    private Condition c1 = lock.newCondition();
    private Condition c2 = lock.newCondition();
    private Condition c3 = lock.newCondition();

    public void print5(){
        lock.lock();
        try{
            //1.判断
            while(number != 1){ //number不等于1 那么轮不到 1对应的A线程干活，所以 1-A线程等着
                c1.await();
            }
            //2.干活
//            for (int i = 1; i <= 5 ; i++) {
//                System.out.println(Thread.currentThread().getName()+"\t"+i);
//            }
            System.out.println(Thread.currentThread().getName()+"线程 \t A");
            //3.通知
            number=2;//修改标识位
            c2.signal();

        }catch(Exception e){
            e.printStackTrace();
        }finally{
           lock .unlock();
        }
    }
    public void print10() {
        lock.lock();
        try{
            //1.判断
            while(number!=2){
                c2.await();
            }
            //2.干活
//            for (int i = 1; i <=10 ; i++) {
//                System.out.println(Thread.currentThread().getName()+"\t"+i);
//            }
            System.out.println(Thread.currentThread().getName()+"线程 \t B");
            //3.通知
            number=3;
            c3.signal();
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            lock.unlock();
        }
    }
    public void print15(){
        lock.lock();
        try{
            //1.判断
            while(number != 3){
                c3.await();
            }
            //2.干活
//            for (int i = 1; i <=15 ; i++) {
//                System.out.println(Thread.currentThread().getName()+"\t"+i);
//            }
            System.out.println(Thread.currentThread().getName()+"线程 \t C");
            //3.通知唤醒
            number=1;
            c1.signal();
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            lock.unlock();
        }
    }
}
public class LockConditionDemo {
    public static void main(String[] args) {
        ShareSource shareSource = new ShareSource();

        new Thread(() -> {
            for (int i = 1; i <=10 ; i++) {
                shareSource.print5();
            }
        }, "A").start();
        new Thread(() -> {
            for (int i = 1; i <= 10; i++) {
                shareSource.print10();
            }
        }, "B").start();
        new Thread(() -> {
            for (int i = 1; i <= 10 ; i++) {
                shareSource.print15();
            }
        }, "C").start();

    }
}
